(19)
(11) EP 0 291 320 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.01.1990 Bulletin 1990/04

(43) Date of publication A2:
17.11.1988 Bulletin 1988/46

(21) Application number: 88304340.8

(22) Date of filing: 13.05.1988
(51) International Patent Classification (IPC)4: G01K 11/00, G01L 1/25, G01N 23/05
(84) Designated Contracting States:
CH DE FR IT LI SE

(30) Priority: 14.05.1987 GB 8711327

(71) Applicant: ROLLS-ROYCE plc
London, SW1E 6AT (GB)

(72) Inventors:
  • Stewart, Peter Anthony Eabry
    Frenchay Bristol (GB)
  • Fowler, Peter Howard
    Westbury-on-Trym Bristol (GB)

(74) Representative: Bird, Vivian John 
Rolls-Royce plc PO Box 3
Filton, Bristol BS12 7QE
Filton, Bristol BS12 7QE (GB)


(56) References cited: : 
   
       


    (54) Method and apparatus for measuring strain and temperature of an object simultaneously


    (57) A method of non-invasively measuring strain and temperature of an object, substantially simultaneously, using neutrons of selected energy levels is described. A pulsed neutron source is made to emit thermal and epithermal neutrons in a collimated beam directed at a target object. Temperature is monitored by observing the thermal Doppler broadening of resonances in the neutron transmission characteristic for the epithermal neutrons and strain is measured form observed made of changes to the thermal neutron diffraction pattern.







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